A microstructural and neutron-diffraction study on the interactions between microwave-irradiated multiwalled carbon nanotubes and hydrogen

作者：Lee, Y. T.; Tsai, P. J.; Peterson, V. K.; Yang, B.; Lin, K. S.; Zhu, M.; Lim, K. L.; Tseng, Y. S.; Chan, S. L. I.^*

来源：Journal of Materials Science, 2016, 51(3): 1308-1315.

DOI：10.1007/s10853-015-9448-4

• STORAGE CAPACITY
• NANOPARTICLES
• ADSORPTION

Microwave irradiation is a simple yet effective way of altering the properties of multiwalled carbon nanotubes (MWNTs). This work studies the interactions between microwave-irradiated MWNTs and hydrogen. Effects of MWNT diameter and irradiation duration on the hydrogen-storage capacity have been investigated. We find that microwave irradiation induces damage to the MWNTs that can enhance hydrogen-storage capacity, with excessive damage being detrimental. Smaller-diameter tubes suffer less damage than larger tubes do. MWNTs with a diameter of 20-40 nm irradiated for 10 min had the highest hydrogen uptake of the samples measured, of 0.87 wt% at room temperature and under a hydrogen pressure of 3 MPa. Neutron powder-diffraction data revealed structural changes that were consistent with the insertion of hydrogen in the interstitial cavities of the microwave-irradiated MWNTs, as well as an expansion between the graphene layers of samples that were microwave irradiated. Hence, this simple treatment could be a promising solution to improve the hydrogen-storage capacities of MWNTs.

• 出版日期2016-2
• 单位华南理工大学